Ace Your CRT-450 Developers Exam

 To avoid exceeding the view state limit of 170 KB12, the developer should implement pagination with a StandardSetController. A StandardSetController allows the developer to display a set of records in a Visualforce page with built-in support for pagination, sorting, and filtering3. By using a StandardSetController, the developer can limit the number of records that are displayed and stored in the view state at a time, and provide navigation buttons for the user to access the next or previous set of records.

The other options are not correct because:

• A. Use Lazy loading and a transient List variable. This option is not effective, because lazy loading means that the data is loaded only when it is needed, but it still requires storing the data in the view state. A transient List variable is not included in the view state, but it also means that the data is lost after each request and has to be queried again, which can affect performance and consistency.
• B. Use JavaScript remoting with SOQL Offset. This option is not recommended, because JavaScript remoting does not support pagination, sorting, or filtering, and requires additional JavaScript code to handle the callbacks and display the data. SOQL Offset is also limited to 2,000 records, and can cause performance issues when used with large data sets.
• C. Implement pagination with an OffsetController. This option is not optimal, because an OffsetController is a custom controller that uses SOQL Offset to implement pagination. As mentioned above, SOQL Offset has limitations and drawbacks that make it unsuitable for large data sets.

References:

• : Optimize the View State
• : Create More Complex Visualforce Pages with Increased View State Limit
• : StandardSetController Class
• : [Transient Keyword]
• : [SOQL OFFSET Clause]

To ensure that Pricing_Structure__c records are available when the test class is executed, the developer can use either a Test Data Factory class or the @isTest(seeAllData=true) annotation. A Test Data Factory class is a reusable class that creates test data for multiple test classes. The developer can use this class to insert the Pricing_Structure__c records before running the test methods. The @isTest(seeAllData=true) annotation allows the test class to access all data in the organization, including the Pricing_Structure__c records. However, this annotation should be used sparingly and only when strictly necessary, as it may cause the test to fail due to data changes or dependencies. The Test.startTest() and Test.stopTest() methods are used to mark the start and end of the test execution, and do not affect the data availability. The without sharing keyword on the class declaration does not affect the test data isolation, and only determines whether the class enforces the sharing rules of the current user or not. References:

• Isolation of Test Data from Organization Data in Unit Tests (Salesforce Developer Documentation)
• Creating Test Data for Apex Tests (Salesforce Developer Documentation)
• Using the isTest Annotation (Salesforce Developer Documentation)
• Using the startTest and stopTest Methods (Salesforce Developer Documentation)
• Using the with sharing or without sharing Keywords (Salesforce Developer Documentation)
• Free Salesforce Platform Developer 1 Practice Exam (With Answers) (Salesforce Ben)

• The @testSetup annotation is a way to create test data for a test class. It allows you to define a method that runs once before any test methods in the class and inserts common test data into the test context12.
• The @testSetup annotation is not supported when the GisTest(SeeAllData=True) annotation is used. The GisTest(SeeAllData=True) annotation allows a test class or method to access all data in the organization, including pre-existing data that the test didn’t create. If this annotation is used, the test setup method is skipped and no test data is inserted12.
• Test data is inserted once for all test methods in a class when the @testSetup annotation is used. This means that the test data is shared across all test methods and only counts once towards the governor limits. This can improve the performance and efficiency of the test class12.
• A method defined with the @testSetup annotation does not execute once for each test method in the test class and does not count towards system limits. It only executes once before any test methods and only counts once towards the governor limits. However, any DML operations or queries performed in the individual test methods do count towards the system limits12.

References:

• 1: Using Test Setup Methods
• 2: Cert Prep: Platform Developer I: Testing and Debugging

The code snippet uses a for loop to create a list of 200 Account objects, each with a unique name. Then, it uses the Database.insert method to insert the list of accounts into the database in one DML operation. The Database.insert method returns a list of Database.SaveResult objects, which contain information about the success or failure of each record insertion. However, the code snippet does not check the results or handle any errors that might occur. Therefore, the result of the code snippet is that 200 accounts are inserted, unless an exception is thrown due to a trigger, validation rule, governor limit, or other reason. References:

• Apex Developer Guide: Using Database Methods
• Apex Developer Guide: Bulk DML Exception Handling
• Trailhead: Apex Basics & Database